Rotary pump.



` w. Hl. @L a. w. LEMAN.

Patented Jan. 1919.

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RTMRY PUMP.

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Specification o Letters Patent.

Patented dan. 1 119111131.

Application tiled. August $21, 1917. Serial No. 187,371.

,To all whom t may conccm l 'i l lie it know/n that We, WILLIAM H.Llaman and Grenen', W. LnIMAN citizens ofthe United States, andresidentsof Newark, in

the county of Esseihandtate of New J ersey, have in ented a new anduseful linprovement i Rotary Pumps, of which the following islaspeoiiioation. j

ln rotary pumps-Where aneccentrically mounted rotary diskis locatedWithin the pyl'indrical chamber arid in which spring- `:pressed pistonsslide radially in said rotary dish, the pistons frequently work hard andcramp because; of their necessarily short all oithesel faults, the firstaultbeingob-- viatrld'by mounting' the pistons tangentielly to give theman extended bearing inthe dish; the4 second fault being obviated byprovidiia y means whereby any piston on its inward iovement willpositively start another Apiston 0n its outward movement-v should ithappen to stick; andthe third Jfault being obvli-ated by providing thedislr with a ,transverse recess in its periphery along the tace Nof eachot the. pistons for recei ino; collect inatihe cylindrical chamber andtend to clog' thepump. Y

A practical embodiment of our invention is represented in theaccompanying drawings in which,

Figure 1 represents the pump in sideele vatiefn, Fig. 2 representsthe'samein end elevation, liig. 3 represents the pump in section takenin the plane of the line Hlf--IliI of Fig. 1,

and

Fig. Il represents the pump in section taken along the plane of the linelV--lW ont Fig. 2.

'lhe pump comprises the casing 1 and end plates 2, 3, a having suitableinlet and outlet ports 5, 6. A cylindrieally mounted rotary disk.7 is

located w1 'hin the cylindrical chamber 4, its

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draft being; denoted by 8.

` Tangentially arranged spring-pressed 4pistons, in the present instancetwo overlapping,

the foreign matter which might` forming a cylindrical chamber.

pistons 9, l0, are slidably mounted in the rotary disk i, the springsl1, 12, serving to force the pistons outwardly against the innerperimeter of the cylindrical chamber di. Transverse recesses 13, 14:,are located in the peripheryof the rotary disk 7, along the faces of thepistons 9, l0, in position to receive any foreign matter which maycollect in the cylindrical chamber andthus obviate' any liability of thepump becomingl clogged by the lodgment of such foreign matter be tweenthe inner perimeter of the cylindrical halinloer i and the periphery otthe rotary is Z.

Means are employed whereby either piston on its inward movement willpositively start the otherpiston on its outward inereinent should ithappen to sticlr, which ineens in the present instance, is shown as alinger 15, secured to the piston 9 and projeetinp,l into position toengage a shoulder itl on the piston 10. This finger 'l5 forms a lost'motion connection between the two pistons,

the said n er bein so arranoed that iii one of the pistons tails tostart on its outu ward 'movement by becoming stuelr or through theweakness oft its spring', the inward movement of the other piston will,

through the said finger, positively start the First :named piston on itsoutward movement, thus automatically correcting this fault in the pump.

By arran M,ingr the pistons tangentially in stead of radially, theyWorlr more easily and F may be made longer than heretofore.

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llt is obvious that various changes may-be r.resorted to in the form,construction and arrangein nt 4otjthe several parte without departingyfrom the spirit and scope oit our invention, and hence we do not `wishto limit ourselves. strictly to the structure herein shown anddescribed, but

What we claim is:

1. 1n .a rotary puuipvh cylindrical chain ber having suitable inlet andoutlet pints,l

an eccentrically mounted rotary dish,

`spring-pressed pistons slidingF therein, said pistons being parallel toeach other with re spect to a diametrical plane, and a ineciraiiii calmeans for positively operating said pis tons whereby one piston onits'inward move-- ment will positively start another piston on itsoutward movement should it happen to stick. y

2. ln a rotary pump, a Icylindrieal chamber having suitable inletandoutlet ports,

lill@ an eccentrically mounted rotary disk, spring p'ressed pistonssliding therein, said pistons being parallel to each other with respectto a diametrical plane, one of said pistons being provided with a fingerarranged to engage another piston, whereby one piston on its inwardmovement will positively start another piston on its outward movementshould it happen to stick., l

3. In a rotary pump, a cylindrical chamber having suitable inlet andoutlet lports, an eccentrically mounted rotary disk, spring pressedpistons sliding therein, said pistons .piston a being parallel to eachother with respect to a diametrieal plane, one of said pistons beingprovided with a shoulder and another finger arranged to engage saidshoulder, whereby one piston on its inward movement will positivelystart another pistonl on its outward movement should it happen' tostick.

In testimony, that We claim the foregoing as our invention, we havesigned our names 25 day of July, 1917.

WILLIAM H. LEIMAN.

GEORGE W. LEIMAN.

